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Sitting and standing tolerance in patients with chronic back pain: comparison between physician prediction and covert observation.

Abstract：

OBJECTIVES:To measure covertly observed continuous sitting and standing tolerance in patients with chronic back pain and to compare observations to physician predictions. DESIGN:Blinded, prospective, cohort study. SETTING:Ambulatory referral centers, both public and private, at 5 major medical centers in the eastern United States. PARTICIPANTS:All volunteers (N=154; 64.0% women, mean age, 48.7y; 16.8% had active lawsuits) with diagnosis codes of the International Classification of Diseases, 9th Revision consistent with thoracic and/or lumbosacral back pain were selected from a cohort of 651 outpatients with chronic pain enrolled in the Multiperspective Multidimensional Pain Assessment Protocol (MMPAP). INTERVENTIONS:Not applicable. MAIN OUTCOME MEASURES:Continuous sitting and standing tolerance was measured by (1). covert observation of subjects during the MMPAP trial and (2). blinded expert physician prediction based on complete history and physical examination. RESULTS:Most (124/154, 80.5%) subjects stood for 30 minutes or more and most (124/154, 80.5%) sat for 60 minutes or more. Overall, physicians underpredicted the ability to sit 60 minutes or more and to stand 30 minutes or more. Physician prediction showed poor correlation to covert observation for sitting tolerance (kappa=-.061, P=.221) and standing tolerance (kappa=-.021, P=.727). CONCLUSIONS:The majority of this sample demonstrated the ability to sit continuously 60 minutes or more and to stand continuously 30 minutes or more while being covertly observed. Expert physician prediction showed poor correlation to covertly observed sitting and standing tolerances, raising doubt about the validity of using physician evaluation to establish work restrictions in patients with chronic back pain. These findings are preliminary, follow only a brief period of covert observation, and indicate the need for further research in this area.

journal_name

Arch Phys Med Rehabil

journal_title

Archives of physical medicine and rehabilitation

authors

Brokaw JP,Walker WC,Cifu DX,Gardner M

doi

10.1016/j.apmr.2003.09.026

subject

Has Abstract

pub_date

2004-05-01 00:00:00

pages

837-9

issue

eissn

0003-9993

issn

1532-821X

pii

S0003-9993(03)01224-3

journal_volume

pub_type

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Sitting and standing tolerance in patients with chronic back pain: comparison between physician prediction and covert observation.